[Wayland-bugs] [Bug 748957] New: scroll bar becomes black

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=748957

            Bug ID: 748957
           Summary: scroll bar becomes black
    Classification: Platform
           Product: gtk+
           Version: 3.16.x
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: Backend: Wayland
          Assignee: gtk-bugs at gtk.org
          Reporter: gnome at genodeftest.de
        QA Contact: gtk-bugs at gtk.org
                CC: rob at robster.org.uk, wayland-bugs at lists.freedesktop.org
     GNOME version: ---

Steps to reproduce:
1. run a gnome wayland session (as in Fedora 22)
2. open gnome system-monitor, display the process list. This only works if you
have enough processes so that a vertical scroll bar is displayed.
3. resize the columns in a way that they do not fit the whole screen width
4. hover the vertical scroll bar with your mouse

Expected behavior:
Scroll bar should fade in and out.

What happens:
While scroll bar is fading in and out it turns black for a short time. After
fading out sometimes the freed space is not redrawn at all but stays black
until content is refreshed.

I can reproduce this with at least one other gtk application:
nautilus (keep in mind that you have to repeat step 3. for this to work)

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